General Information:
Chemical Formula:
KNaMn++Si4O10
Composition:
(Molecular Weight = 389.36 gm)
Potassium 10.04 % K
Sodium 5.90 % Na
Manganese 14.11 % Mn
Silicon 28.85 % Si
Oxygen 41.09 % O
Empirical Formula:
KNaMn2+Si4O10
IMA Status:
Approved IMA
Physical Properties:
Cleavage:
[001] Perfect, [010] Perfect
Color:
colorless, creamy white, or rosy.
Density:
2.73
Diaphaniety:
Transparent to Translucent
Hardness:
5 - Apatite
Luster:
Vitreous (Glassy)
Streak:
white
More details...